From: Mark Harmstone <mark@harmstone.com>
To: linux-btrfs@vger.kernel.org
Cc: Mark Harmstone <mark@harmstone.com>, Boris Burkov <boris@bur.io>
Subject: [PATCH v8 14/17] btrfs: add do_remap param to btrfs_discard_extent()
Date: Wed, 7 Jan 2026 14:09:14 +0000 [thread overview]
Message-ID: <20260107141015.25819-15-mark@harmstone.com> (raw)
In-Reply-To: <20260107141015.25819-1-mark@harmstone.com>
btrfs_discard_extent() can be called either when an extent is removed
or from walking the free-space tree. With a remapped block group these
two things are no longer equivalent: the extent's addresses are
remapped, while the free-space tree exclusively uses underlying
addresses.
Add a do_remap parameter to btrfs_discard_extent() and
btrfs_map_discard(), saying whether or not the address needs to be run
through the remap tree first.
Signed-off-by: Mark Harmstone <mark@harmstone.com>
Reviewed-by: Boris Burkov <boris@bur.io>
---
fs/btrfs/extent-tree.c | 11 +++++++----
fs/btrfs/extent-tree.h | 2 +-
fs/btrfs/free-space-cache.c | 2 +-
fs/btrfs/inode.c | 2 +-
fs/btrfs/volumes.c | 23 +++++++++++++++++++++--
fs/btrfs/volumes.h | 2 +-
6 files changed, 32 insertions(+), 10 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 70020ba8ef92..9d68f3fa4fa9 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1381,7 +1381,7 @@ static int do_discard_extent(struct btrfs_discard_stripe *stripe, u64 *bytes)
}
int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
- u64 num_bytes, u64 *actual_bytes)
+ u64 num_bytes, u64 *actual_bytes, bool do_remap)
{
int ret = 0;
u64 discarded_bytes = 0;
@@ -1399,7 +1399,8 @@ int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
int i;
num_bytes = end - cur;
- stripes = btrfs_map_discard(fs_info, cur, &num_bytes, &num_stripes);
+ stripes = btrfs_map_discard(fs_info, cur, &num_bytes,
+ &num_stripes, do_remap);
if (IS_ERR(stripes)) {
ret = PTR_ERR(stripes);
if (ret == -EOPNOTSUPP)
@@ -2932,7 +2933,8 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans)
if (btrfs_test_opt(fs_info, DISCARD_SYNC))
ret = btrfs_discard_extent(fs_info, start,
- end + 1 - start, NULL);
+ end + 1 - start, NULL,
+ true);
next_state = btrfs_next_extent_state(unpin, cached_state);
btrfs_clear_extent_dirty(unpin, start, end, &cached_state);
@@ -2990,7 +2992,8 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans)
ret = -EROFS;
if (!TRANS_ABORTED(trans))
ret = btrfs_discard_extent(fs_info, block_group->start,
- block_group->length, NULL);
+ block_group->length, NULL,
+ true);
/*
* Not strictly necessary to lock, as the block_group should be
diff --git a/fs/btrfs/extent-tree.h b/fs/btrfs/extent-tree.h
index d7b6aeb63656..ff330d4896d6 100644
--- a/fs/btrfs/extent-tree.h
+++ b/fs/btrfs/extent-tree.h
@@ -161,7 +161,7 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
struct extent_buffer *parent);
void btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, u64 start, u64 end);
int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
- u64 num_bytes, u64 *actual_bytes);
+ u64 num_bytes, u64 *actual_bytes, bool do_remap);
int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
void btrfs_handle_fully_remapped_bgs(struct btrfs_fs_info *fs_info);
int btrfs_complete_bg_remapping(struct btrfs_block_group *bg);
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 8d4db3d57cf7..17e79ee3e021 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -3677,7 +3677,7 @@ static int do_trimming(struct btrfs_block_group *block_group,
}
spin_unlock(&space_info->lock);
- ret = btrfs_discard_extent(fs_info, start, bytes, &trimmed);
+ ret = btrfs_discard_extent(fs_info, start, bytes, &trimmed, false);
if (!ret) {
*total_trimmed += trimmed;
trim_state = BTRFS_TRIM_STATE_TRIMMED;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 247b373bf5cf..3915e08d252c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3370,7 +3370,7 @@ int btrfs_finish_one_ordered(struct btrfs_ordered_extent *ordered_extent)
btrfs_discard_extent(fs_info,
ordered_extent->disk_bytenr,
ordered_extent->disk_num_bytes,
- NULL);
+ NULL, true);
btrfs_free_reserved_extent(fs_info,
ordered_extent->disk_bytenr,
ordered_extent->disk_num_bytes, true);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index caffee6527b2..b0aef4d489e7 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3425,7 +3425,7 @@ static int btrfs_relocate_chunk_finish(struct btrfs_fs_info *fs_info,
*/
if (btrfs_is_zoned(fs_info)) {
ret = btrfs_discard_extent(fs_info, bg->start, length,
- NULL);
+ NULL, true);
if (ret)
btrfs_info(fs_info,
"failed to reset zone %llu after relocation",
@@ -6111,7 +6111,7 @@ void btrfs_put_bioc(struct btrfs_io_context *bioc)
*/
struct btrfs_discard_stripe *btrfs_map_discard(struct btrfs_fs_info *fs_info,
u64 logical, u64 *length_ret,
- u32 *num_stripes)
+ u32 *num_stripes, bool do_remap)
{
struct btrfs_chunk_map *map;
struct btrfs_discard_stripe *stripes;
@@ -6135,6 +6135,25 @@ struct btrfs_discard_stripe *btrfs_map_discard(struct btrfs_fs_info *fs_info,
if (IS_ERR(map))
return ERR_CAST(map);
+ if (do_remap && map->type & BTRFS_BLOCK_GROUP_REMAPPED) {
+ u64 new_logical = logical;
+
+ ret = btrfs_translate_remap(fs_info, &new_logical, &length);
+ if (ret)
+ goto out_free_map;
+
+ if (new_logical != logical) {
+ btrfs_free_chunk_map(map);
+
+ map = btrfs_get_chunk_map(fs_info, new_logical,
+ length);
+ if (IS_ERR(map))
+ return ERR_CAST(map);
+
+ logical = new_logical;
+ }
+ }
+
/* we don't discard raid56 yet */
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
ret = -EOPNOTSUPP;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index ccf0a459180d..505a50689fb0 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -732,7 +732,7 @@ int btrfs_map_repair_block(struct btrfs_fs_info *fs_info,
u32 length, int mirror_num);
struct btrfs_discard_stripe *btrfs_map_discard(struct btrfs_fs_info *fs_info,
u64 logical, u64 *length_ret,
- u32 *num_stripes);
+ u32 *num_stripes, bool do_remap);
int btrfs_read_sys_array(struct btrfs_fs_info *fs_info);
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info);
struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans,
--
2.51.2
next prev parent reply other threads:[~2026-01-07 14:10 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-07 14:09 [PATCH v8 00/17] Remap tree Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 01/17] btrfs: add definitions and constants for remap-tree Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 02/17] btrfs: add METADATA_REMAP chunk type Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 03/17] btrfs: allow remapped chunks to have zero stripes Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 04/17] btrfs: remove remapped block groups from the free-space tree Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 05/17] btrfs: don't add metadata items for the remap tree to the extent tree Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 06/17] btrfs: rename struct btrfs_block_group field commit_used to last_used Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 07/17] btrfs: add extended version of struct block_group_item Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 08/17] btrfs: allow mounting filesystems with remap-tree incompat flag Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 09/17] btrfs: redirect I/O for remapped block groups Mark Harmstone
2026-01-25 12:57 ` Chris Mason
2026-02-18 14:29 ` Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 10/17] btrfs: handle deletions from remapped block group Mark Harmstone
2026-01-25 12:49 ` Chris Mason
2026-01-07 14:09 ` [PATCH v8 11/17] btrfs: handle setting up relocation of block group with remap-tree Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 12/17] btrfs: move existing remaps before relocating block group Mark Harmstone
2026-01-25 12:38 ` Chris Mason
2026-01-07 14:09 ` [PATCH v8 13/17] btrfs: replace identity remaps with actual remaps when doing relocations Mark Harmstone
2026-01-07 14:09 ` Mark Harmstone [this message]
2026-01-07 14:09 ` [PATCH v8 15/17] btrfs: allow balancing remap tree Mark Harmstone
2026-01-25 12:00 ` Chris Mason
2026-01-07 14:09 ` [PATCH v8 16/17] btrfs: handle discarding fully-remapped block groups Mark Harmstone
2026-01-07 14:09 ` [PATCH v8 17/17] btrfs: populate fully_remapped_bgs_list on mount Mark Harmstone
2026-01-21 22:12 ` [PATCH v8 00/17] Remap tree David Sterba
2026-01-23 10:04 ` Filipe Manana
2026-01-23 10:15 ` Mark Harmstone
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